关键词: 赤泥;动弹性模量;阻尼比;含水率;加载频率

Abstract: In order to study the kinetic parameters of loess solidified by red mud under different water conditions, the modified soil under different water content was studied by GDS dynamic triaxial instrument at different frequencies.The effects of vibration time, moisture content and loading frequency on the dynamic modulus and damping ratio of modified soil were studied.The experimental results show that the dynamic modulus keeps with the increase of the vibration time, and the damping ratio changes in volatility with the increase of the vibration time under the same dynamic stress amplitude.It is proved that dynamic modulus and damping ratio of tenth times of vibration can be used to represent the dynamic modulus and damping ratio at various levels loads.The dynamic elastic modulus increases then decreases with the increase of dynamic strain amplitude, and is fitted with the quadratic function.Damping ratio decreases first and then increases with dynamic strain.The dynamic modulus reaches the maximum at its optimal moisture content, and the higher water content makes the modified soil elastic modulus decrease obviously.The dynamic modulus decreases with the increase of the frequency at small strain amplitude, and increases with the increase of the frequency when the amplitude is larger.The damping ratio is larger when the loading frequency is high.

Key words: red mud;dynamic elastic modulus;damping ratio;moisture content;loading frequency